package stephen.com.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter({"/dept/*", "/article/*", "/home/*", "/login/*", "/meet/*", "/view/*", "/users/*"})
public class ContinueFilter implements Filter {
	@Override
	public void init(FilterConfig filterConfig) throws ServletException {

	}

	@Override
	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
	                     FilterChain filterChain) throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest) servletRequest;
		HttpServletResponse resp = (HttpServletResponse) servletResponse;
		Object obj = req.getSession().getAttribute("userId");
		if (null != obj) {
			System.out.println("session不为空");
			filterChain.doFilter(req, resp);
		} else {
			System.out.println("session为空");
			resp.sendRedirect(req.getContextPath() + "/");
		}
	}

	@Override
	public void destroy() {

	}
}
